4.2查看当前网卡信息
[root@shad0w-top ~]# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: em1: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond1 state UP qlen 1000
link/ether 20:04:0f:f8:38:08 brd ff:ff:ff:ff:ff:ff
3: em2: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond1 state UP qlen 1000
link/ether 20:04:0f:f8:38:08 brd ff:ff:ff:ff:ff:ff
4: em3: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond2 state UP qlen 1000
link/ether 20:04:0f:f8:38:0a brd ff:ff:ff:ff:ff:ff
5: em4: <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP> mtu 1500 qdisc mq master bond2 state UP qlen 1000
link/ether 20:04:0f:f8:38:0a brd ff:ff:ff:ff:ff:ff